You never forget your first!

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PSz.

PSz.

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Joined 2003
#1
Hi all,

I recently completed my first chip amp. LM1875s, 0.1% metal film resistors, 10uF noname caps, my pcbs, 12V 7Ah SLA batteries, and tons of inspiration from everyone who posted questions, comments, pics, schematics, etc.

Huge thanks to all!!!

The amp is dead quiet, runs cool, and sounds incredible.:nod:
Next stop... balanced inputs to match up w/ my new Behringer DEQ2496.

I will try to attach some pics... be patient this is my first post!

PSz.
 

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#8
Hello,
Thank you for your comments!

The speaker terminals are on top, I dug them out of a bin at a local surplus shop.

I would be honored to see my chipamp in the Gainclone Gallery with the work of everyone who inspired me!
Excellent work there Nuuk!😎

Now for a pic of the bottom...
 

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#11
Sorry about the pic quality, but this is to show the scale. The feedback resistor is hiding behind the chip. Everything else can be seen. No coupling cap on the input here!
:devily:

Oh yeah, because it's an inverted amp the red output lead is connected to ground. Just in case you were wondering.

PSz.
 

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#16
For those interested in very nice quality extruded aluminum cases for their projects I am posting a link to the manufacturer of the case I used in this project. The company is Context Engineering based in San Jose, CA. I stopped by there yesterday and they will do custom stuff of all sizes, predrill holes, as well as laser inscribe words/ markings. I spoke with Linda Erskine there and she was very helpful. Oh yeah, I have no financial interest in Context, just thought I would pass along their info.

http://www.consite.com/context/cont_circuit.htm

Thanks again guys for your kind comments!🙂

Sincerely,
PSz.
 
#18
PSz. said:

Next stop... balanced inputs to match up w/ my new Behringer DEQ2496.
PSz.
Click to expand...


Very nice work PSz, my question is how do you find the Behringer DEQ2496? As I understand it, the DEQ2496 is a 'low cost' room correction piece of kit and I am wondering if there is an automatic room analysis routine for initial setup of the device? Thanks for any help you can give a newbie to this forum.
 
#19
Do a search of the forum, and you will learn a lot more than I could tell you! 🙂

I like the DEQ. I modded mine with oscons and 2604 opamps. Very worthwhile. It does do room correction, but it really only gives you a starting point. You have to learn how to use the machine, and know what you want from it. It is so flexible and will do what you tell it, so you have the opportunity to really mess up your sound. If you are willing to invest a little cash and climb the learning curve then you will be rewarded.😀

Trust YOUR ears and have fun!😎

PSz.
 
#20
I'm a big fan of those context engineering boxes. I've picked mine up from Fry's electronics here in Seattle. They seem comparable in price to the Hammond Enclosures, but they look FAR better.

By the way, great design! I've been toying around with my context boxes, trying to figure out how I'll cram some binding posts on the backside... I like your solution, but unfortunately, I don't think it'll work with the posts I have.

Still, great lookin' stuff!
 
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